No I use a 1/14 twist M70 Winchester Stealth in 22,250 the 55gr is the heaviest weight bullet I use ,
Years ago when I did my DSC1 I had used the 52 HPBT for ever and when it came to the shooting test the p###k wouldnt let me shoot the match round and it had to be a BT so I scrounged some 55gr vee max of a friend and had to do the test again and have used them ever since ,
With out checking my book I think its 35gr vit140 for the 55gr, point and shoot out to 200yds 3moa for 300yds then it gets interesting , had very good groups at 500yds on still nights ,
ATB